How Much Fuel Does a Smoke Actually Use?

The number nobody gives you before you buy the smoker

Fuel is the cost that keeps arriving. The cooker is bought once; the bags are bought forever, and almost nobody tells you the rate before you commit.

Here is the honest version, split into the part we can compute and the part we refuse to guess at.

Pellets: computable, and the answer is more than you think

Published consumption for a pellet grill runs like this:

Multiply that by a cook time and you get the figure that actually matters. These come from the same arithmetic behind our cook-time pages, so they move if the charts move.

Hotter is not more expensive

The intuition says a hotter cook burns more fuel. Per hour it does — consumption roughly doubles from 225°F to 325°F. Per cook it usually does not, because the cook gets shorter faster than the rate rises.

The 8 lb pork shoulder in that table is the clean demonstration. At 225°F it is 9–20 lb over 12–16 hours. At 275°F it is 10–17.5 lb over 8–10 hours — a tighter range, in a bit over half the time.

So running hotter is not a fuel decision. It is a bark-and-schedule decision, and the fuel comes out roughly level either way.

Why the ranges are so wide

Because each figure is two ranges multiplied together: the cook time is a range, and the consumption rate is a range.

The low end of "13.5–30 lb" is the fast cook running at the low rate. The high end is the slow cook at the high rate. Both happening at once is unlikely, so the truth sits nearer the middle — but you buy fuel against the top, because running out is the only outcome that ruins the cook.

Cold weather and wind push you toward the high end. So does opening the lid.

Charcoal: we will not give you a number

Every site that tells you "you need 8 lb of charcoal for a brisket" has invented it. Here is why nobody can honestly do that arithmetic.

Charcoal burns at the rate the fire is fed air, and the air depends on the cooker, the vents, the weather and you. The manufacturers' own figures make the point better than we can: Jealous Devil publishes 4+ hours for open-air grilling and 20+ hours in a smoker for the same charcoal in the same bag.

That is a five-fold spread from one variable — how choked the fire is. Add firebox size, wind, ambient temperature and lid discipline, and any single number is a guess wearing a lab coat.

Wood chunks last far longer than either

Chunks are not the heat source. They are the smoke, sitting on top of a fire made of something else, so you are using three or four per cook rather than filling a basket.

Weber publishes 350 cubic inches for a bag of hickory chunks, which is a volume rather than a weight — and volume is the right unit here, because you buy chunks by the handful and not by the hour.

A bag lasts many cooks. It is the one fuel line that does not really need budgeting.

What this means when you buy

Pellet grill: buy in 40 lb rather than 20 lb if your supplier offers it, and keep a spare bag. The hopper is not the constraint — the cook is. A 20 lb hopper with a 30 lb cook in front of it needs refilling at some point, and the point is usually the middle of the night.

Charcoal: buy more than you think and stop trying to compute it. Leftover charcoal keeps indefinitely if it stays dry, so over-buying costs nothing but shelf space.

Chunks: one bag, and stop thinking about it.

For what to put in the hopper or basket in the first place, our fuel comparison covers what each brand publishes and what it does not. To work out the cook time these figures multiply against, the smoker calculator takes your cut and weight and gives you the window — and the pellet estimate alongside it.